Question

我正在尝试从URL获取JSON数据并存储在sqlite db.From sqlite db我将数据转换为JSON对象数组并使用该值我试着执行if if else条件我有n没有在JSON created_at和field3中的对象是要在此执行的数据如果field3为0我必须忽略，如果field3为1，我们必须计算从该obj日期n时间到下一个obj的日期n时间差异，其中field3结束1.我的代码如下。

function renderList1(tx,result){ 
    newJson = [ ];
    if (result != null && result.rows != null) {
        for (var k = 0; k < result.rows.length; k++) {
            var row = result.rows.item(k);
            newJson[k] = { created_at:row.Created_at,entry_id:row.entry_id,field1:row.Field1,field2:row.Field2,field3:row.Field3 };
        }
    }
    var jsonAll = JSON.stringify(newJson);
    console.log(jsonAll);
    var feeds = $.parseJSON(jsonAll);
    console.log(feeds);

    power();
    function power(){
    for (var i=0;i<feeds.length;i++) //feeds contain the JSON data
    {
        if(feeds[i]["field3"] === "1"){       
        //Start Time
        var d1 = new Date(feeds[i]["created_at"]);
        console.log(d1);
        for (var j=i+1;j<feeds.length;j++) //compare objects starting from 'i' till next "1" is found
        {   
            if(feeds[j]["field3"] === "0")  
            {
                //End Time
                var d2 = new Date(feeds[j]["created_at"]);
                console.log(d2);
                j=feeds.length;
            }
        }
        //Time difference in milli seconds
        var diff = d2.getTime() - d1.getTime();
        var diffInHours= diff / 1000diff/ 3600 / 1000;
        console.log(diffInHours);
        var pow = Powercon * diffInHours;
        console.log(pow);
    }else{
        console.log("Field3 is 0");
        }
    }
}

JSON数据：

[
{
    "created_at": "2017-04-12T08:53:46Z",
    "entry_id": 37368,
    "field1": "14",
    "field2": "0",
    "field3": "0"
},
{
    "created_at": "2017-04-12T09:03:54Z",
    "entry_id": 37369,
    "field1": "14",
    "field2": "0",
    "field3": "0"
},
{
    "created_at": "2017-04-12T09:14:02Z",
    "entry_id": 37370,
    "field1": "14",
    "field2": "0",
    "field3": "0"
},
{
    "created_at": "2017-04-12T09:24:03Z",
    "entry_id": 37371,
    "field1": "15",
    "field2": "0",
    "field3": "0"
},
{
    "created_at": "2017-04-12T09:34:06Z",
    "entry_id": 37372,
    "field1": "15",
    "field2": "0",
    "field3": "0"
},
{
    "created_at": "2017-04-12T09:44:09Z",
    "entry_id": 37373,
    "field1": "15",
    "field2": "0",
    "field3": "0"
},
{
    "created_at": "2017-04-12T09:54:12Z",
    "entry_id": 37374,
    "field1": "15",
    "field2": "0",
    "field3": "0"
},
{
    "created_at": "2017-04-12T10:04:20Z",
    "entry_id": 37375,
    "field1": "15",
    "field2": "0",
    "field3": "0"
},
{
    "created_at": "2017-04-12T10:24:20Z",
    "entry_id": 37376,
    "field1": "15",
    "field2": "0",
    "field3": "0"
},
{
    "created_at": "2017-04-12T10:44:27Z",
    "entry_id": 37377,
    "field1": "15",
    "field2": "0",
    "field3": "0"
},
{
    "created_at": "2017-04-12T10:54:30Z",
    "entry_id": 37378,
    "field1": "15",
    "field2": "0",
    "field3": "0"
},
{
    "created_at": "2017-04-12T11:04:34Z",
    "entry_id": 37379,
    "field1": "16",
    "field2": "0",
    "field3": "0"
},
{
    "created_at": "2017-04-12T11:14:37Z",
    "entry_id": 37380,
    "field1": "16",
    "field2": "0",
    "field3": "0"
},
{
    "created_at": "2017-04-12T11:24:40Z",
    "entry_id": 37381,
    "field1": "15",
    "field2": "0",
    "field3": "0"
},
{
    "created_at": "2017-04-12T11:34:43Z",
    "entry_id": 37382,
    "field1": "15",
    "field2": "0",
    "field3": "0"
},
{
    "created_at": "2017-04-12T11:44:46Z",
    "entry_id": 37383,
    "field1": "15",
    "field2": "0",
    "field3": "0"
},
{
    "created_at": "2017-04-12T11:54:49Z",
    "entry_id": 37384,
    "field1": "16",
    "field2": "0",
    "field3": "0"
},
{
    "created_at": "2017-04-12T12:04:53Z",
    "entry_id": 37385,
    "field1": "15",
    "field2": "0",
    "field3": "0"
},
{
    "created_at": "2017-04-12T12:14:56Z",
    "entry_id": 37386,
    "field1": "15",
    "field2": "0",
    "field3": "0"
},
{
    "created_at": "2017-04-12T12:25:00Z",
    "entry_id": 37387,
    "field1": "16",
    "field2": "0",
    "field3": "0"
}
]

我尝试上面的代码，当我运行我遇到问题在if和else条件如果field3等于1它应该执行如果条件但它将去其他条件。任何人可以帮我在哪里出错？？三江源

Answer 1

if(feeds[i]["field3"] === 1){

应该解决问题。它被视为整数。此外，您应该考虑使用更高阶函数或lodash.js，这对数组操作非常有用，并使您的代码更易于管理和读取。

if else条件解析时出错

1 个答案: